Hi. I'm playing Mario Kart Wii with my friend over net play. We want to unlock everything but need help.

I can't figure out how to use the gecko/ar codes to unlock everything. I've enabled cheats in the configurations tab, used the button to download gecko cheats. Selected "unlock everything" and went to the cheat manager and clicked apply. I've been looking online for solutions but can't find anything that works. I even got a 100% save file for us but it seems that save games are disabled on the Wii side of the emulator.